Question 322333
The sum of the angles in a triangle is 180.
{{{A+B+C=180}}}
{{{A=4B}}}
{{{C=B+18}}}
Substituting
{{{4B+B+B+18=180}}}
{{{6B=162}}}
{{{B=27}}}degrees
{{{A=4(27)=108}}}degrees
{{{C=27+18=45}}}degrees